Spark-coil.



No. 811,656. PATENTED FEB. 6, 1906. O. P. L. NOXON.

SPARK COIL.

APPLICATION FILED SEPT. 26, 1904.-

2 SHEETS-SHEET 1.

No; 811,656. PATENTED FEB. 6, 1906.

G.P.L.NOXON.

SPARK COIL.

APPLICATION FILED SEPT. 26. 1904.

2 SHEETS-SHEET 2.

WITNESSES: INVENTOR 4/ Z I ATTORNEYS To all whom it may concern:

connected in a circuit.

UNITED STATES PATENT OFFICE.

I Specification of Letters Patent.

Patented Feb. 6, 1906.

Application filed September 26, 1904. Serial No. 225,930.

Beit known that 1, CHARLES P. L. Noxon, of Syracuse, in the countyof;Onondaga and State of New York, have invented a certain new anduseful Spark-Coil, of which the following is a specification.

My invention relates to induction-coils which are particularly efiicientin use; and it conslstsm the combmations and means herei inafter setforth and claimed. In describing this invention reference is had to theaccompanying drawings, in which like characters designate correspondingparts in all the views.

Figure 1 is a diagrammatic view of a preferable construction of aninduction-coil embodying my invention, shown as operatively Fig. 2 is asimilar diagrammatic view illustrating a modified construction embodyingsaid invention. Fig. 3 is a top lan of an induction-coil arranged in acase, t e cover of the case being removed. Fig. 4 is a verticalsectional view on line A A, Fig. 3.' Figs. 5 and 6 are views similar toFi 4, illustrating modified constructions of induction-coils, amechanical means formakiFng and breaking the circuit being shown in 1 isa primary conductor, 2 a secondary conductor, and 3 a core, all of whichparts maybe of any desirable form, size, and con-' struction suitablefor use in induction-coils. The conductors 12 are respectively connectedin the ordinary manner in a primary circu1t and a secondary circult, anda suitable source of electric energy 4, mechanical means 5 for makingand breaking a circuit, and a current interrupting means are connectedin the primary circuit, the means 5 being usually theignition-controlling mechanism of the internal-combustion engine towhich my induction-coil is connected and the currentinterrupting meanscomprising a terminal 6. An armature 7, which is normallyin electricalcontact with the terminal 6, is moved from the terminal for breaking theprimary circuit and is engaged with said terminal for completing thecircuit by any suitable means, as a spring 8.

9 is an electromagnetic means for attracting the armature 7 when theprimary circuit is broken by the current-interrupin means and forpreventing such armature rom: returning into engagement with theterminal 6 to complete the, circuit. Said electromagnetic means 9 ispreferably arranged with its core extendin longitudinally between thearmature 7 an the core 3 and forming, essentially, a continuation ofsaid core 3 and with its coil or conductor connected in shunt intheprimary circuit. 1t thusfollows that the electromagnetic means 9 bridgesthe gap formed in the primary circuit when the armature 7 is separatedfrom the terminal 6.

, The conductor or coil of the electroma netic means 9 is of highresistance relative y to the portion of the primary circuit throng whichno current passes when the circuit is broken at the terminal 6 in orderthat the major part of the current may 1pass through the terminal6instead of throug such means 9, and said electromagnetic means isinsufficient in power to attract the armature 7 when engaged withtheterminal 6; but when the armature 7 is attracted by the core 3 themeans 9 is of sufficient strength to prevent the return of the armatureuntil the mechanical means 5 breaks the primary circuit, whereupon themeans 9 loses its power and ceases to attract the armature 7, whichthenreturns into contact with the terminal 6. The electrical resistance ofthe electromagnetic means 9 is suflicient to reduce the amperage of thecurrent flowing over the primary circuit when the armature 7 isseparated from the terminal 6, so that the core 3 is prevented fromperforming its necessar function of causin a magnetic field capa le ofmaking the in uction-coil operative and also has no perceptibleinfluence on the armature to prevent the return thereof.

As preferably constructed the electromagnetic means 9 is provided with aspur 10, in-

serted into the opposing end of the core 3, and is also provided with anexternal electric conducting-case 11, which encircles the coil orconductor of said means and is arranged with one end face insubstantially the same plane as the face of the core of said meansengaged with the armature 7.

In Fig. 5 I have shown a modified construction of the electromagneticmeans for preventing the return of t e armature, the same com risin twocores 12, driven into the core of t e in notion-coil, and coils 13,wound around the projecting ends of said cores.

The electromagnetic means 9 for preventing the return of the armaturewhen the cur- IIO alinement with the core 3, in which event the armatureof the current-interruptin means is not attracted by the core 3. In t 'sform of my invention the current does not flow through the primaryconductor of the induction-coil when the armature is out of contact withthe terminal engaged by said armature to com lets the primary circuit.

To t ose skilled in the art it Will be understood that by preventing thereturn of the armature of the current-interruptingmeans immediatelyafter the current is broken the roduction of more than one spark is avoied, and the current passes through the mechanical means 5uninterruptedly and with maximum power and with minimum wear of the Iseparable contacting surfaces of the currentinterrupting means, owing tothe elimination of unnecessary makes and breaks of the circuit.Moreover, when the mechanical means 5 operates to break the circuit asmall current is passing over the same, and a minimum amount of sparkinand wear of the separable contacting 'sur aces of the primary circuitresults. My invention is therefore particularly ractical and efficient,especially when use with internal-combustion engines, in which greatdifliculty is experienced by undue corroding and burning of theterminals for igniting the charges, and as my inductioncoil 1s excitedbut once for each explosion it is therefore especiall economical inconnection with engines w 'ch are run at varying speeds.

The construction and operation of my induction-coil will now be readilyunderstood upon reference to the foregoing description and theaccompanying drawings, and it will be apparent to those skilled in theart that more or less change may be made therein without departing fromthe spirit of my invention.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is

1. The combination of a primary circuit, a secondary circuit, means forinterrupting the current in the primary circuit, means for holding thefirst-mentioned means in its position assumed when the current isinterrupted thereby, and mechanical means for making and breaking theprimary circuit, substantially as and for the purpose described.

2. The combination of a primary circuit, a secondary circuit, meansactuated by the current in the primary circuit for interruptingthe'current 1n said primary circuit, electromagnetic means for holdingthe first-mentioned means in its position assumed when the current isinterrupted thereby, and mechanical means for making and breaking theprimary circuit, substantially as and for the purpose specified.

3. The combination of a primary circuit, a secondary circuit, means forbreaking the prierases mary circuit to interrupt the current therein,electroma netic means for holding the firstmentione means in itsposition assumed when the current is interrupted thereby, saidelectromagnetic means being connected in the primary circuit to bridgethe gap formed in the primary circuit by the first-mentioned means tointerrupt the current therein, and mechanical means for making andbreaking the primary circuit, substantially as and for the purpose setforth.

4. The combination of a primary circuit, a secondary circuit, meansactuated by the current in the primary circuit for breakin the primarycircuit to interrupt the current t erein, electromagnetic means forholding the first-mentioned means in its position assumed when thecurrent is interrupted thereby, said electromagnetic means beingconnected in the primary circuit to bridge the gap formed in the primarycircuit by the first-mentioned means to interrupt the current thereinand being of greater resistance than. the part of the primary circuitthrough which no current passes when the first-mentioned means hasinterru ted the current, and mechanical means for making and breakingthe primary circuit, substantially as and for the purpose described.

5. The combination of a primary circuit, a secondary circuit, means forinterrupting the current in the primary circuit comprising a terminal inthe primary circuit, an armature movable relatively to the terminal formak ing and breaking the primary circuit at the terminal,electromagnetic means for holding the first-mentioned means in itsposition assumed when the current is interrupted there by, andmechanical means for making and breaking the primary circuit,substantially as and for the purpose specified.

6. The combination of a primary circuit, a secondarycircuit,electromagnetic means having a core, and conductors connectedrespectively in said circuits, means for interrupting the current in theprimary circuit, the operation of said means for interrupting thecurrent being effected by the magnetic action of the core, means forcausing the sec ond-mentioned means to return to its position assumedbefore the o eration thereof to interrupt the current in tiie primarycircuit, means for holding the second-mentioned means in its positionassumed when the current is interrupted thereby, and mechanical meansfor making and breaking the primary circuit, substantially as and forthe purpose set forth.

7. The combination of a primary circuit, a secondary circuit, means forinterrupting the current in the primary circuit, said means including anarmature, and a plurality of means connected in the primary circuit forattracting the armature, one of said means continuing to attract thearmature after the other mentioned means to return to its position as,'sumed before the operation thereof to interru'ptthe current in theprimary circuit, electromagnetic means forholding the first-mentionedmeans in its position assumed when the current is interrupted thereby,saidelectromagnetic means having a core arranged endwise relatively tothe first-mentioned core and forming essentially a continuation thereof,and mechanical means for making and breaking the primary circuit,substantially as 1 and for the purpose specified.

9. The combination with an induction-coil, of means'for making andbreaking'the primary circuit of the induction-coil, and means forbreaking and holding open the primary circuit during the time thefirst-mentioned means is in its position assumed when making the primarycircuit.

10. In an induction-coil, a core, a primary conductor, andelectromagnetic means having a conductor connected in circuit with theprimary conductor, and a core fixed to the first-mentioned core,substantially as and for the purpose set forth.

11. In combination, an armature, the primary conductor of aninduction-coil and means for attracting the armature independ' .ently ofthe primary conductor, said means being in electrical connection withthe primary conductor when the circuit therethrough is complete,substantially as and for the purpose specified.

12. In an induction-coil, a core, a primary conductor, electromagneticmeans arranged end to end relatively to the core and having a conductorconnected in circuit with the pri mary conductor when the circuitthrough said primary conductor is complete, a core forming essentially acontinuation of the firstmentioned core, and a conducting-shieldencircling the conductorof the electromagnetic means, substantially asand for the purpose described.

In testimony whereof I have hereunto signed my name, in the presence oftwo attesting witnesses, at Syracuse, in the county of Onondaga, in theState of New York, this 24th day of September, 1904.

CHARLES P. L. NOXON.

Witnesses:

D LAVINE, F. G. BODELL.

